To chat via internet, in Portuguese (Brazil). The expression neans "to type". You can also see "teclar" in bad spelling: "tc".
Got it? Nice. Now, have fun. X3
"Vamos teclar agora!" (Let's chat now!)
"Ei gostosa, q tc?" (Hey hottie, wanna chat?)
"Teclo c/ vc depois." (Talk to u latta.)